Abstract: An electronic timepiece with a calendar display function that drives a piezo-electric actuator to drive a rotation of a piezo-electric rotor, and stops the drive of the piezo-electric actuator when the amount of the piezo-electric rotor advances is detected by a spring switch. Photoreflectors are used for day detection accomplished using gears having a small speed reduction ratio relative to the piezo-electric rotor, and spring switches are used in month detection and year detection.

Abstract: The present invention proposes an optical wavelength division multiplexer device which has low through loss and low reflection loss, and also has high isolation. A filter member is made up from a filter base board upon which is formed a wavelength division filter 5, and is disposed so as to intersect an input and output optical waveguide 3 of rectilinear form part-way along it at an intersection angle .alpha.. When light which includes light of two different wavelengths .lambda..sub.1 and .lambda..sub.2 is incident through an incident light side of the input and output optical waveguide 3, the light of wavelength .lambda..sub.2 passes through the wavelength division filter 5 and is emitted through an emitted light side, while the light of wavelength .lambda..sub.1 is reflected by the wavelength division filter 5 in a direction separated from the input and output optical waveguide 3.

Abstract: A camera includes a recording device for recording data on a film, a data setting device for setting the data to be recorded, a mode selecting device for selecting between a multiple exposure photography mode and a normal photography mode, a varying device for varying the data set by the data setting device, an inhibition device having an operative state for inhibiting the varying device from varying the data set by the data setting device, and a non-operative state for allowing the varying device to vary the data set by the data setting device, and a maintenance device for maintaining the operative state of the inhibition device while the multiple exposure photography mode is selected, and for transitioning to the non-operative state of the inhibition device when multiple exposure photography is terminated.

Abstract: A camera which has an objective lens for forming an object image on a film, and a pseudo telescopic information input device for recording on the film pseudo telescopic information for selecting a field smaller than an actual field of the objective lens, and also has a device for inhibiting switching of information input by the pseudo telescopic information input device during a multiple exposure photographing operation.

Abstract: A blur detecting apparatus is provided with a light projecting means for projecting a signal light, light receiving means for receiving the signal light projected from the light projecting means and detecting the received position of the signal light, guide means for guiding the signal light projected from the light projecting means to the light receiving means, and varying means for varying the guiding action of the guiding means in conformity with blur and varying the received position of the signal light received by the light receiving means and in which the blur state is detected from the received position of the signal light detected by the light receiving means.

Abstract: A rotary power unit has a first vibration member; a second vibration member having a different phase than that of said first vibration member; a ring member rotatably supported by the first vibration member and the second vibration member, the ring member being adapted to make an eccentric rotation by the vibrations of the first vibration member and the second vibration member; and an output member having a smaller outer diameter than an inner diameter of said ring member, the output member being adapted to make a rotary motion in partial and internal contact with the ring member by the eccentric rotation of the ring member.

Abstract: In a distance measuring device for measuring distance to an object by projecting a light beam onto the object and receiving the reflected light therefrom, the light beam to be projected onto the object is divided into a plurality of directions by a reflecting system so that a plurality of object distances can be measured at the same time.

Abstract: A magnetically driven motor includes an output shaft, a magnetic conical plate, a stationary guide, and at least three electromagnets. The output shaft is supported to be rotatable about a predetermined central line. The magnetic conical plate has a vertex on the predetermined central line, is rotatable together with the output shaft about the predetermined central line, is swingably supported to be inclined with respect to the predetermined central line, and has a predetermined peripheral length. The stationary guide has the predetermined central line as an axis, has a vertex angle slightly smaller than a vertex angle of the conical plate, has an annular guide surface corresponding to part of a conical surface of the conical plate, and is adapted such that a peripheral portion of the conical plate is swingable along the guide surface. The guide surface of the stationary guide has a peripheral length larger than that of the conical plate.

Abstract: A distance measuring device for a camera includes a first distance measuring arrangement adapted for measuring the distance of the middle part of a photographing field; a second distance measuring arrangement for measuring the distances of the middle and peripheral parts of the field; and a switch for selection between the first and second distance measuring arrangements.

Abstract: The disclosed distance measuring device for a camera capable of measuring the distances of a plurality of objects within a target area comprises center-weighting means for treating the distance information of the object whose image lies near or at the center of the area of the picture frame with a heavier emphasis than those of the other objects, whereby an optimum focusing adjustment is allowed to be formed automatically.

Abstract: A signal processing apparatus for a semiconductor position sensing device has an impedance element connected to one output terminal thereof. When a distance to an object is to be detected, an impedance of the impedance element is varied until the outputs of the sensing device substantially balance. The distance to the object is determined by the impedance of the impedance element when the outputs balance.

Abstract: A rear light condition detecting device for a camera is arranged to measure distances to a plurality of parts appearing within a taking picture plane on the assumption that an object located nearby is the main object to be photographed or that a light source such as the sun is among faraway objects. The device determines the object to be in a rear-light or counter-light condition in cases where the luminance of the nearby object is extremely lower than other objects or that of a faraway object is extremely higher than other objects.

Abstract: A distance measuring device for a camera of the kind measuring distances to a plurality of spots within a photo-taking image plane gives accurate data of distance measurement. The device comprises in combination signal projecting means arranged to project a distance measuring signal onto the spots of the image plane one after another; signal receiving means arranged to receive a reflection signal resulting from the distance measuring signal and to produce measured distance data one after another according to the part thereof at which the reflection signal is received; and measured distance data selection means arranged to select, from among the measured distance data obtained one after another from the signal receiving means, a data fluctuating to a less degree than a predetermined value as an effective measured distance data.

Abstract: A distance detecting device comprising radiation projecting means for projecting a radiation beam; radiation sensing means which is disposed away from the radiation projecting means with a given length and is arranged to receive a reflected radiation beam coming from an object whose distance is to be detected as the radiation beam is projected from the projecting means; and movable means for relatively varying the incident condition of the projected radiation beam onto the sensing means. The distance to the object is found either by the position of the movable means or by the amount of displacement thereof which occurs at a time point at which the sensing means optimally receive the reflected radiation beam coming from the object in the process of relatively varying the incident condition of the projected radiation beam onto the sensing means.

Abstract: A camera comprises an exposure meter having a pointer deflected to a position dependent upon the brightness level of an object to be photographed, a scanning mechanism actuated by a camera release to scan the position of the deflected pointer with the scanning result being introduced to a lens aperture mechanism, an automatic focus adjusting device actuated by the camera release to control the focusing of an objective lens in accordance with a photoelectrically sensed distance from the camera to the object, and a control mechanism. Since the photoelectric elements in measuring the object distance have a relatively long time lag, the control mechanism functions upon actuation of the camera release to defer the actuation of the scanning mechanism and the autofocusing device, pending completion of the detection of the object distance. In this manner, an exposure setting accurately corresponding to the prevailing lighting conditions is obtained.